Coke oven construction



Feb. 21, 1939. M, D. CURRAN COKE OVEN CONSTRUCTION Filed Aug. 8, 1936 Patented Feb. 21, 1939 PATENT orFlcE 2,148,108 conn ovEN CONSTRUCTION Maurice D. Curran, Glendale, Mo., assgnor to Tar & Petroleum Process Company, Chicago,

Ill., a corporation of Application August 8,

, 5 Claims.

'Ihe present invention relates to improvements in coke oven construction.

`\The patent to Knowles No. 1,745,996, granted February 4, 1930, discloses a sole-fired coke oven heated by a plurality of independent sole combustion flues arranged beneath the sole of the oven. Said patent discloses an improvement in means for distributing the air and" waste heat gases in the ues t provide increased heating in the nues toward the middle of the oven and to decrease excessive heating at the ends of the oven, thereby improving uniformity of heating throughout the lengths of the iiues. 'Ihe present invention relates to the same general subject matter as the Knowles patent referred to, but contemplates other means for accomplishing the uniformity of flue heating. Certain subject matter disclosed but not claimed herein are claimed in 2 94,917, both med August a, 1936.

Further objects will appear as the description proceeds.

The one gure of the drawing is a vertical cross sectional view taken longitudinally of a coke oven embodying the principles of the present invention.

The numeral I indicates the floor or sole of a coke oven, and the numeral 2 indicates the roof thereof. Said roof is provided with the openings 3 3 for charging coal into the oven, and the numeral 4 indicates a standpipe through which by-products may be taken off. Each front of the oven chamber is provided with a door, said doors being indicated by the numerals 5 and 6.

Disposed below the floor I are a plurality of flues 1 extending longitudinally of the oven. Said ilues may be separated by Walls (not illustrated) upstanding from the horizontal wall 8, which wall defines the bottom boundary of the flues 'I. As illustrated in the drawing, said wall 8 is formed to provide apertures 9-9 adjacent to the end Walls of the oven whereby to provide communication from the flues 1 to the space below the wall 8. Projecting downwardly from the wall 8 is the medial wall I dividing the space below the h orizontal wall 8 into two regenerators. Projecting from each end wall of the oven is a baiiie wall II, which baille walls are shaped to provide apertures I2-I2 adjacent to the medial wall Ill. Each of said baiiie walls I I-I I therefore provides applicants applications Serial Nos. 94,916 and Illinois 1936, Serial No. 94,918

a Lvl-shaped passageway, or hairpin passageway, indicated by the numeral I3 from a region adjacent to an end wall of the oven to a region adjacent to the medial wall I0 back to the region of the corresponding aperture 9.

Connecting with the passageways I3-I3 of the regenerators at the two ends of the oven are downt'akes Ill- I4 leading to the waste gas tunnels I-I5.

According to the illustrated embodiment of the present invention, the oven is provided with a plurality of passageways Iii-I6, extending from the two ends of the oven to the region adjacent to the medial wall I0. Said passageways communicate with the atmosphere at the two ends of the oven, and at the middle of the oven com,-

. municate with air downtakes I1I1 which lead to the hot air tunnel I8. Said tunnel I8 communicates through the pipe 'I9 with the fan box 2U. Said fanbox 20 is connected by means of pipes 2I--2I (controlled by valves 2Ia,-2Ia) to air manifolds 22-22 at the two ends of the oven, which manifolds 224-22 are connected by means of air inlets 23-23 to the passageways I3--I3 of the regenerators at the two ends of the oven. It will be understood, of course, that the air passageways Il--IG will be protected from direct communication with the gas downtakes I4-I4. inasmuch as the details of the construction relative to the passageways IG-IE formA no part of the present invention, no discussion of said details is necessary herein. Such details form the subject matter of another application iiled by the present applicant of even date herewith y bearing Serial No. 94,917. The numerals 24-24 indicate gas manifolds which ,through gas inlets 25--25 deliver combustible gas to the fiues I-l underlying the sole or floor I.

Proceeding now to a description of the invention claimed herein, a baffle Wall 26 is mounted in each passageway I3-I3, which baffle walls extend from the medial wall I0 toward the ends of the oven. Said bailie walls 2li-26 are disposed in parallel relationship with the horizontal wall 8 and are located between said horizontal wall 8 and the baffle walls II-II. Said baiile walls 2B-2B are shaped to provide apertures 21-21 adjacent to the two end walls of the oven. In other words, said apertures 21-21 are located adjacent to the apertures 9-9 at the two ends of the horizontal wall 8. The horizontal wall 3, which forms the lower boundary of the flues 'I-1, is providedwith a plurality of apertures 28--28 providing communication between the space above the baille walls 26-26 and said iiues 1 1.

' The mode of operation of the above described embodiment of the present invention is substantially as follows: Gas for heating the flues 'l--l will be alternately supplied through the gas inlets 25-25 at the two ends of the oven. When gas is supplied through the left-hand gas inlets 25 as the parts are viewed in the drawing, air will be supplied through the inlets 23 at the same end of the oven, which air,-in passing through the corresponding regenerative passageway I3, will be preheated for mixture with the gas being delivered from said gas inlets 25-25. At this time products of combustion from the flues 1 -'I will pass through the right-hand regenerative passageway I3, heating up the structure defining said passageway and passing out through the waste heat tunnel I5 at the right-hand end of the oven.

Continuing with the example in which gas for combustion purposes is admitted'at the left-hand end of the oven, the air for combustion purposes, after passing through the corresponding regenerative passageway I3, will in considerable proportions pass through the aperture 9 at the lefthand end of the oven for uniting with the gas from the gas inlets 25 at the left-hand end of the oven. However, a material proportion of the gas from the left-hand regenerativepassageway I3 will pass along above the partition wall 26 to the apertures 28-28 to unite with unburned portions of the gas delivered toward the midregion of the oven. The result is a. relatively uniform heat distribution throughout the length of the iiues VI-`I. At the same time the products of combustion will in part pass downwardly through the apertures 28-28 at the right end of the oven and the remainder of said waste heat gases will pass downwardly through the apertures 9 at the right-hand end of the oven. The result is the `avoidance of excessive heat at the outer end of Slide bricks 29--29 have been illustrated for modifying the extent of the apertures 9 9. Other slide bricksIl-lll may be provided for izno-dizfying the extent of opening of the apertures Though a preferred embodiment of the present invention has been described in detail, many modications will occur t0 those skilled in the art. It is intended to cover all such modifications that fall within the scope of the appended claims.

What is claimed is- 1. In a coke oven, in combination, a horizontal coking floor, .a horizontal wall below said iioor forming the lower boundary of heating ilues extending longitudinally of said oven, means dividing the space below said horizontal floor into a pair of regenerative chambers, means in each of said chambers providing a tortuous passageway therethrough, said horizontal floor having a plurality of apertures spaced lengthwise of said oven and providing communication between said soV iiues and said regenerative chambers, means for admitting-gas to said ues at the ends of said oven remote from said dividing means, means for admitting airto said regenerative chambers, and imperforate baille means in part defining said tortuous .passageways and extending from said dividing means toward the ends of said oven for distributing air through said apertures.

' 2. In a coke oven, in combination, a horizontal coking floor. a horizontal wall below said iioor forming the lower boundary oi heating flues extending longitudlnally of said oven', means dividy ing the-space below said horizontal iioor into a pair of regenerative chambers, means in each of said chambers providing a tortuous passageway therethrough, said horizontal floor having a plurality of apertures spaced lengthwise of said oven and providing communication between said flues and said regenerative chambers, means for admitting gas to said flues at the ends of said oven remote from said dividing means, means for admitting air to said regenerative chambers, imperforate baiiie means in part defining said tortuous passageways and extending from said dividing means toward the ends of said oven for distributing air through said apertures, and means for modifying the extent of opening of said apertures. l

3. In an oven structure, in combination, a coking floor, iiues disposed below said floor, said flues being dened on their bottom sides by a wall having perforations therealong communicating with said ues, said oven structure being provided with a pair of regenerative chambers disposed below said wall, dividing means disposed transversely of said oven structure medially thereof to separate said regenerative chambers, means for delivering gas to said iiues at the two ends of said oven structure remote from said dividing means, each of said regenerative chambers having an outlet to deliver regenerated air formixture with gas from its corresponding gas delivering means, and imperforate baille means extending from said dividing means toward the ends of said oven structure and defining in part said regenerative chambers, said baille means being disposed in position to retard the flow of air from Asaid regenerative chambers through said spaced openings in said wall whereby to distribute regenerated air lengthwise of the path of flame propagation from said gas delivering means.

4. In a coke oven, in combination, a coking oor, said oven having longitudinal ues below said oor, the lower boundary of said iiues being defined by a horizontal wall having apertures spaced therealong, a medial wall dividing the space below said horizontal wall into two regenerative chambers, said apertures providing communication between said regenerative chambers and said fiues at regions spaced longitudinally of said oven, means for delivering gas at the two ends of said iiues remote from said medial wall, and imperforate baille walls extending from said medial wall for controlling the distribution of regenerated air to said apertures in said horizontal wall.

5. In a sole-fired coke oven provided with a plurality of sole combustion ues arranged under the sole of the oven for heating it, a plurality of regenerators for alternately supplying preheated air to said flues, said oven having a wall separating said regenerators from said ues, said wall being provided with spaced openings disposed along said oven providing communication between said regenerators and said flues at regions spaced longitudinally of said iiues, in combination, baille walls extending from the midregion of said oven toward the ends thereof in part deiining said regenerators to control the distribution of heated air from a selectable one of said regenerators to said fiues and to control the discharge of waste heat gases from said ues to the other of said regenerators.

MAURICE D. CURRAN. 

